How much does a 3.00 to 4.99ct E SI1 natural marquise diamond cost?

As of October 2026, 3.00 to 4.99ct E SI1 natural marquise diamonds typically cost $54,779 SGD to $96,436 SGD, with a median price of $70,898 SGD. There are currently 12 diamonds matching this specification available across retailers.

Where can I find the best price on a E SI1 marquise diamond?

About 40% of these diamonds are available at multiple retailers, with an average price spread of 20%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct E SI1 Natural Marquise

Quick answer

As of October 2026, there are 12 natural marquise diamonds with E colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $54,779 SGD to $96,436 SGD, with a median of $70,898 SGD. At least 52 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 20%. Half of all listings fall between $20,951 SGD and $25,687 SGD per carat. The same specification in lab grown form lists at a median of about $526 SGD per carat. Over the last 30 days the median price moved -0.6% and the number of listings moved +11.6%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Marquise natural stones in the index: 2,268 USD per carat, +10.8% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: October 2026

Available

Lowest Price

$48,551 SGD

Highest Price

$175,371 SGD

Average Price

$73,159 SGD